Data Services Products:
EMC-PEM
Parametric Earth Models

Summary

Parametric Earth Models (PEM) — Three models (Average, Continental & Oceanic) that were introduced by Dziewonski, Hales and Lapwood (1975) for which the radial variations of density and velocity are represented by piecewise continuous analytical functions of radius. All three models are identical below a depth of 420 km.

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Description

Name

PEM (PEM-A, PEM-C & PEM-O)

Title

Parametric Earth Models (PEM)

Type

1-D Reference Earth Model

Sub Type

full model

Year

1975

Short Description

Parametric Earth models (PEM) introduced by Dziewonski, Hales and Lapwood (1975) consists of three models for which the radial variations of density and velocity are represented by piecewise continuous analytical functions of radius. All three models are identical below a depth of 420 km.